Bolt and nut lock.



A. DAMBOISE.

BOLT AND NUT LOCK. APPLICATION FILED FEB.27. m4.

1 2 1 6 5 7. Patented Feb. 20, 1917 rinTTnn sTATns rATnnT ognrron.

ARTHUR DAMBOISE, OF MILLINOCKET, MAINE.

BOLT AND NUT LOCK.

Specification of Letters Patent.

Application filed February 27, 1914. Serial No. 821,492.

To all whom z't may concern:

Be it known that I, ARTHUR DAMBOISE, a subject of the King of Great Britain, residing at Millinocket, in the county of Penobscot and State of Maine, have i11- vented certain new and useful Improvements in. Bolt and Nut Locks; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to bolt and nut locks, and one of the principal objects of the invention is to provide a bolt and nut lock which will be secure, which will permitthe adjustment of the nut on the bolt and which will lock it in place when adjusted, and which may be readily withdrawn from the bolt by means of a simple tool.

Another object of the invention is to sim plify the construction of bolt and nut locks and to provide means whereby the nut may be quickly removed from the bolt whenever.

desired.

These and other objects may be attained by means of the constructionillustrated in the accompanying drawing, in which,

Figure 1 is a side elevation of a bolt having a nut thereon, said nut being shown in partial section and constructed in accordance with this invention.

Fig. 2 is a sectional view on the line 22 of Fig. 1, looking in the direction indicated by the arrows.

Referring to the drawings, the numeral 1 designates a bolt having oppositely disposed ratchet grooves 2 formed therein, said grooves each having a shoulder 3, and said grooves extending throughout the threaded portion 4 of the bolt.

The nut 5 is providedupon its inner facewith a recess 6. Pivoted upon a screw 7 in said recess is a pawl or dog 8, having a curved inner edge 9 terminating in a nose l0 and a projection 11, the latter being inclosed within the recess 6 by the projecting wall 12, which serves to prevent the with drawal of the pawl. A spring 18, bent in substantially U-shape is secured to the outer edge of the dog 8, said spring bearing against the upper wall of the recess 6 to hold the dog or pawl 8 into engagement with the shoulder 3 of theratchet groove in the bolt.

From the foregoing it will. be obvious that Patented Feb. 20, 1 917.

The nut may be turned at any time to hold the parts closer together when they have become loosened in use, and when it is desired to remove the. nut entirely from the bolt an instrument may be inserted in the groove 2 to lift the pawl out of engagement with the shoulder 3 when the nut may then be turned off the bolt.

What is claimed is: I

The hereindescribed bolt and nut lock comprising a bolt provided with a groove, a nut provided in its inner face with arecess opening at one side out through the bore of the nut, a shoulder extending into the recess from one of the end walls thereof in spaced relation to the bottom wall thereby in presence of two witnesses.

ARTHUR DAMBOISE. Witnesses: V

O. A. SMART, V LOUIS DUBORZ, Jr.

Copies of this patent may be obtained. for five cents each, by addressing the Commissioner of Patents,

Washington, D. G. 

